Juction rule: The sum of the currents entering any juction must equal the sum of the currents that juction.
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Loop rule: The sum of the potential differences across all elements around any loop must be zero
What is a junction?
A juction is any place (in a circuit) where two or more wires come together/meet
What is a branch?
A branch is anything that connects two junctions together.
How many junctions are there in this circuit?
How many branches are there in this circuit?